dont hire an attorney yet. not worth it.
contact the cops like others have said. the cops would be very interested in pursuing a guy who gave them forged papers. who knows what kind of charges they are likely to file against him (especially if it pisses off the cop involved as it might hurt his ego that someone conned him into believing that papers were genuine)
pray daily that the guy runs into a large semitruck next time, from the side, in a mountaneous road...probably wont happen but hey you can always hope right.
